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A warm phase within an ice age is referred to as an interglacial period. The Earth is currently in an ice age, the Cenozoic. In turn, the Cenozoic can be subdivided into shorter cold and warm periods.

The Montreal Protocol on ozone-depleting substances was ratified in Montreal in 1987 and amended and expanded in London (1990), Copenhagen (1992), Vienna (1995), Montreal (1997) and Beijing (1999). Re

Predominantly round pieces of ice (diameter of 30 cm to 3 m and up to 10 cm thick) with raised edges that are formed by collisions between smaller pieces. At low temperatures, at the beginning of the

The difference between total incoming energy and total outgoing energy. A positive balance results in warming; a negative, in cooling. Around the globe and over an extended timeframe, the energy balan

Energy can be subdivided into a variety of types and can be used by human beings when it flows from one place to another or is converted from one form into another. Primary energy (also referred to as

Species that are limited to or only native to a specific area or region. In connection with human health, the term can refer to a disease or pathogen that is currently or normally only found in a spec